It is not the same as when metal is rubbing and conducting electricity to metal; Carbon brushes don't because carbon and metal are two different elements.
The motor swing subassembly is an important part of the motor and usually consists of multiple brushes and brush holders. These components play a vital role in electric motors, especially in DC motors and brushed DC motors.
You will find that when you buy a power tool, some products will send two small accessories in the box. Some people know it is a carbon brush, and some people neither know what it is called nor how to use it.
Electrical insulating paper is a special insulating material used to provide electrical insulation protection in electrical equipment and circuits.
Switched Reluctance Motor Magnets